SECTION 3 - CHASSIS & TURNTABLE
3-2
31215031
3.2
OSCILLATING AXLE BLEEDING PROCEDURE AND
LOCKOUT TEST
Lockout Cylinder Bleeding
1.
Position the turntable to the normal stowed position. In
this position the axle is free oscillate. Drive charge pres-
sure will pass through the lock out valve built into the
swivel and down to the pilot section of the hold valves
on the cylinders. This will automatically purge the air
from the pilot section of the circuit.
2.
Disconnect the brake wire connector on the brake valve
located under the drive pump.
3.
Locate the bleeder on the lock out cylinders. Use a small
hose (gas hose, etc.) to direct the oil to a bucket. Do one
cylinder a time. Using a wrench open the bleeder a 1/4
turn. Have the operator in the platform just crake the
drive controller in reverse. This will activate the brake
valve sending charge pressure to the lock out cylinder.
make sure the bleeder is open enough to vent any air for
about 10 seconds. Close the bleeder while there is fluid
pressure at the bleeder.
4.
Repeat the procedure for the other lockout cylinder.
5.
Reconnect the brake wire connector on the brake valve.
MAE18170
BLEEDER VALVE
Oscillating Axle Lockout Test
LOCKOUT SYSTEM TEST MUST BE PERFORMED QUARTERLY, ANY TIME A SYS-
TEM COMPONENT IS REPLACED, OR WHEN IMPROPER SYSTEM OPERATION IS
SUSPECTED.
NOTE:
Ensure boom is fully retracted, lowered, and centered
between drive wheels prior to beginning lockout cylinder
test.
1.
Place a 6 in. (15.2 cm) high block with ascension ramp in
front of left front wheel.
2.
From platform control station, start engine.
3.
Place the Drive control lever to the forward position and
carefully drive machine up ascension ramp until left
front wheel is on top of block.
4.
Carefully activate Swing control lever and position boom
over right side of machine.
5.
With boom over right side of machine, place Drive con-
trol lever to Reverse and drive machine off of block and
ramp.
6.
Have an assistant check to see that left front wheel
remains locked in position off of ground.
7.
Carefully activate Swing control lever and return boom
to stowed position (centered between drive wheels).
When boom reaches center, stowed position, lockout
cylinders should release and allow wheel to rest on
ground, it may be necessary to activate Drive to release
cylinders.
8.
Place the 6 in. (15.2 cm) high block with ascension ramp
in front of right front wheel.
9.
Place Drive control lever to Forward and carefully drive
machine up ascension ramp until right front wheel is on
top of block.
10.
With boom over left side of machine, place Drive control
lever to Reverse and drive machine off of block and
ramp.
11.
Have an assistant check to see that right front wheel
remains locked in position off of ground.
12.
Carefully activate Swing control lever and return boom
to stowed position (centered between drive wheels).
When boom reaches center, stowed position, lockout
cylinders should release and allow wheel to rest on
ground, it may be necessary activate Drive to release cyl-
inders.
13.
If lockout cylinders do not function properly, have quali-
fied personnel correct the malfunction prior to any fur-
ther operation.
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